Texas Gov. Greg Abbott is sending as many as 1,400 National Guard troops to the Mexico border as part of President Donald Trump’s plan to ramp up immigration security — seven times more than he pledged last week.

Abbott said about 300 troops per week will be deployed in coming weeks to help secure Texas’ approximately 1,000-mile border.

Trump last week authorized the National Guard, with governors’ approvals, to enhance U.S. border patrol security. Trump said there is a “drastic surge of illegal activity on the southern border” that threatens national security — and that between 2,000 and 4,000 troops will eventually be sent there.